#!/bin/bash

GDAL_TILE_PROCESSES=16
GDAL_TILE_ZOOMS=8-14
GDAL_SAMPLING_WARP=cubic
GDAL_SAMPLING_TILE=antialias

# Create virtual dataset with coordinates
gdal_translate -of VRT -a_srs EPSG:4326 -outsize 300% 300% -gcp 1851.0 1065.0 22.837216666666666 56 -gcp 12858.0 996.0 23.337216666666666 56 -gcp 12966.0 10740.0 23.337216666666666 55.75 -gcp 1875.0 10827.0 22.837216666666666 55.75 lnb/src1/raw/27342313.jpg 27342313.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1851.0 1065.0\n12858.0 996.0\n12966.0 10740.0\n1875.0 10827.0" | \
  gdaltransform -tps -output_xy 27342313.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  27342313.vrt 27342313.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES 27342313.cut.vrt 27342313.xyz